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Optimize allocs in many

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This commit is contained in:
Adam Scarr 2017-08-13 20:25:41 +10:00
parent a733d0ae13
commit 51ad26c781
1 changed files with 5 additions and 4 deletions
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9
combinator.go
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@ -108,19 +108,20 @@ func manyImpl(min int, op Parserish, sep ...Parserish) Parser {
} }
return func(ps *State, node *Result) { return func(ps *State, node *Result) {
var result Result node.Child = make([]Result, 0, 5)
startpos := ps.Pos startpos := ps.Pos
for { for {
opParser(ps, &result) node.Child = append(node.Child, Result{})
opParser(ps, &node.Child[len(node.Child)-1])
if ps.Errored() { if ps.Errored() {
if len(node.Child) < min || ps.Cut > ps.Pos { if len(node.Child)-1 < min || ps.Cut > ps.Pos {
ps.Pos = startpos ps.Pos = startpos
return return
} }
ps.Recover() ps.Recover()
node.Child = node.Child[0 : len(node.Child)-1]
return return
} }
node.Child = append(node.Child, result)
if sepParser != nil { if sepParser != nil {
sepParser(ps, TrashResult) sepParser(ps, TrashResult)